KR200491844Y1 - Series connection apparatus of battery module - Google Patents

Abstract

The present invention relates to a serial connection device for a battery module. The base 10 forms the skeleton of the present invention. A bus bar seating portion 12 and a substrate seating portion 14 are formed on the base 10, and a plurality of bus bar seating plates 16 are formed on the bus bar seating portion 12. At least two or more hook grooves 17 are formed on both sides of the bus bar seat 16. The bus bar seating table 16 is provided with a bus bar 20 that is electrically connected to a battery cell tab and a substrate. The bus bar 20 has a coupling plate 22 seated on the bus bar seating table 16 and coupled with a battery cell tab, and side plates 24 are formed on opposite ends of the coupling plate 22. The side plate 24 is formed with a through hole 25 at a position corresponding to the hook groove 17, and the through hole 25 is provided with a hook piece 26. The hanger piece 26 is elastically deformed as the tip is guided along the side of the bus bar seat 16, and then hangs on the hanger groove 17. According to the present invention, plastic deformation is prevented in the process of the bus bar 20 being mounted on the bus bar seat 16, and it can be securely mounted without flow.

Description

Series connection apparatus of battery module

The present invention relates to a series connection device for a battery module, and more particularly, to a series connection device for a battery module that sequentially connects electrodes of adjacent battery cells to connect the battery cells of the entire battery module in series.

The battery used in the electric vehicle is composed of a plurality of battery modules to supply as much power as necessary. The battery module is also composed of a plurality of battery cells. When the battery cells are connected in series, relatively large power can be supplied. To this end, a device for sequentially connecting the positive and negative electrodes of a plurality of battery cells in one battery pack is a serial connection device.

In such a series connection device, there are a plurality of bus bars that are electrically connected to the electrodes of the battery cell, as in the prior art documents below, the bus bars are fixed by being fused to a plurality of bases. However, a separate welding equipment is required for the welding operation, and there are problems such as an increase in manufacturing processes.

And, in general, in the case of fusion, a through hole is formed in the bus bar, and a fusion protrusion protruding from the base penetrates through the through hole, so that the tip is fused. There is no noise problem because the relative flow occurs between the busbar and the base.

In order to solve this problem, research is being conducted to ensure that the busbar, which is a metal material, is in close contact with the base, which is an injection material. However, since the bus bar is made of a copper material having good electrical conductivity, the elastic deformation capability is relatively low, so that the bus bar is accurately adhered to the base and thus cannot be fixed.

Republic of Korea Registered Patent No. 10-1329251

The purpose of the present invention is to solve the problems as described above, and to enable the bus bar to be mounted in close contact with the base in a serial connection device for a battery module.

Another object of the present invention is to prevent the flow from occurring in the series connection device for a battery module without the bus bar being mounted to the base without play.

According to the features of the present invention for achieving the above object, the present invention is a series connection device for a battery module that connects the tabs of a plurality of battery cells provided in a battery module in series, made of an insulating material and has both sides A base having a plurality of bus bar seats on which a hook groove is formed, and a hook piece that is elastically deformed and restored while being guided on both sides of the bus bar seat, and then rests while being seated in the hanger groove, and the battery cells It includes a bus bar that is connected to the tab in series and electrically connected to the substrate in the substrate seating portion provided on the base, wherein the bus bar is provided at both ends of the coupling plate and the coupling plate coupled to the tab of the battery cell. Including a side plate, the hook piece is formed in a cantilever shape in the through hole formed in the side plate and extends obliquely toward the opposite side plate, and the distance between the front end of the hook piece and the bottom surface of the engaging plate is the upper surface of the bus bar seat and the hook groove. If the inner surface is one side, it is formed equal to or shorter than the distance therebetween.

A substrate seating portion is formed on the base so that the busbar seating portion is formed to share an edge with the busbar seating portion and the busbar seating portion.

A spacer is provided between the bus bar seats, and a tab of the battery cell passes through the space between the spacer and the bus bar seats.

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According to another feature of the present invention, the present invention is a series connection device for a battery module that connects the tabs of a plurality of battery cells provided in series in a battery module, which is made of an insulating material and has a plurality of busbar seating units. The base includes at least two or more hook grooves formed on side surfaces of the bus bar seat, a coupling plate seated on an upper surface of the bus bar seat, and side plates seated on both sides of the bus bar seat, and the side boards include the hook. The groove is provided with a hook piece on which the tip is hung. The hook piece extends obliquely toward the opposite side plate, so that the distance between the ends of the hook piece is shorter than the distance between both sides of the bus bar seat, and the tabs of the battery cells are connected in series. The distance between the front end of the hook piece and the bottom surface of the coupling plate is electrically connected to the substrate in the substrate seating part provided in the base, and is equal to the distance between the top surface of the bus bar seat and the inside surface of the hook groove. Or short.

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A substrate seating part is formed on the base to share an edge with the busbar seating part having the busbar seating part and the busbar seating part, and a spacer is further formed between the busbar seating part on the busbar seating part.

In the serial connection device for a battery module according to the present invention, the following effects can be obtained.

In the present design, since the bus bar is mounted on the base's seat, only the part of the hanger is elastically deformed and then hangs on the hanger groove formed in the seat, so the entire side of the busbar does not undergo any elastic deformation, so the busbar does not It is possible to accurately adhere to the outer surface. Particularly, since the hook piece is already plastically deformed to be inclined to extend toward the direction of the hanger groove of the seat plate formed on the side plates of both ends, a certain elastic deformation is possible, so that the hanger piece of the busbar is seated on the hanger groove of the seat plate. Since it can maintain the walking state, the bus bar has the effect of being firmly mounted on the outer surface of the seating table.

In addition, in the present design, the hook piece extends in the direction of the hanger groove in the shape of a cantilever so that the tip of the hanger hangs on one inner surface of the hanger groove, so as to cooperate with the connecting piece of the bus bar so that the bus bar is installed without flow from the seat. Can be. Therefore, there is also an effect that the bus bar does not flow with respect to the seating table due to vibration generated during use.

1 is a perspective view showing an important part configuration of a preferred embodiment of a serial connection device for a battery module according to the present invention.
Figure 2 is an exploded perspective view showing the configuration of an embodiment of the present invention.
Figure 3 is a perspective view showing a state in which the bus bar is mounted on the seat in the embodiment of the present invention.
Figure 4 is a cross-sectional view showing a state in which the bus bar is mounted on the seat in the present invention embodiment.
Figure 5 is a cross-sectional perspective view showing a state in which the bus bar is mounted on the seat in the present invention embodiment.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the embodiments of the present invention, when it is determined that detailed descriptions of related known configurations or functions interfere with the understanding of the embodiments of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to the other component, but another component between each component It should be understood that may be "connected", "coupled" or "connected".

As shown in the drawings, the base 10 forms the skeleton of the device of the present invention and is made of an insulating material. The base 10 is mounted on one side constituting the appearance of the battery pack (not shown). The base 10 includes a bus bar seating portion 12 and a substrate seating portion 14. The bus bar seating portions 12 are equipped with bus bars 20 to be described below. The substrate seating portion 14 is formed by being partitioned from the other part in one region of the base 10, and the substrate is seated therein. The board is electrically connected to the bus bar 20 to be described below, and a fuse, a connector for connection with the outside, etc. is mounted.

The bus bar seating portion 12 shares one edge with the substrate seating portion 14 and is formed at a position corresponding to tabs (not shown) of a plurality of battery cells constituting a battery pack. In the bus bar seating portion 12, a bus bar seating table 16 and a spacer 18 having a substantially square bar shape are alternately formed. There is a gap between the bus bar seating table 16 and the spacer 18 so that the tab of the battery cell passes.

Hanging grooves 17 are formed on both sides of the bus bar seating table 16. The hook groove 17 is concave in the side of the bus bar seat 16. On one inner surface of the hook groove 17, a hook surface 17' is formed. The hook surface 17' is a portion where the tip of the hook piece 26 to be described below is hung, and is preferably made in a shape corresponding to the tip of the hook piece 26. In this embodiment, the hook surface 17' is a rectangular plane. The distance between the hook surface (17') and the upper surface of the bus bar seating table (16) is the distance between the front end of the hook piece (26) of the bus bar (20) and the bottom surface of the coupling plate (22), which will be described below. Same or greater is better. By doing so, it is possible to prevent the flow of the bus bar 20 from being brought into close contact with the tip (17') of the hook piece (26).

In this embodiment, four hook grooves 17 are formed at both ends of both sides of one bus bar seat 16. The number of hook grooves 17 formed in one bus bar seat 16 is different depending on the length of the bus bar 20, but at least four hook grooves 17 are preferably formed.

The spacer 18 is formed one by one between the bus bar seat 16. The spacer 18 allows insulation between the tabs of the battery cell to be secured, and the width is determined according to the interval between the battery cell tabs. In the base 10, reference numeral 19 is a hook piece, which is combined with one side of the battery pack or other components constituting the device of the present invention.

The bus bar 20 is seated on the bus bar seating table 16. The bus bar 20 is made of a metal material. The bus bar 20 is preferably made of copper or copper alloy having good electrical conductivity. The bus bar 20 is electrically connected to the tab of the battery cell, and is also electrically connected to a substrate (not shown) mounted on the substrate seating portion 14.

The bus bar 20 is formed by bending at right angles to both sides of the coupling plate 22 in the form of a rectangular plate, and the side plates 24 are formed. The coupling plate 22 is fixed by welding tabs of a battery cell.

The side plate 24 is formed through a through hole 25 at a position corresponding to the hook groove 17. In the through hole 25, a cantilever-shaped hook piece 26 is formed. In the hook piece 26, a free end is extended toward the coupling plate 22. The hook piece 26 extends obliquely toward the opposite side plate 24 of the bus bar 20, as is well illustrated in FIGS. 4 and 5. That is, the distance between the front ends of the hook pieces 26 is formed shorter than the distance between the two side plates 24.

As the hanger piece 26 extends inclined in this way, the distance between the tips becomes shorter than the distance between the two side plates 24, so that the hanger piece 26 is capable of a predetermined elastic deformation. Since the hanger piece 26 is formed to extend obliquely toward the opposite side plate 24, the hanger piece 26 is when the bus bar 20 is mounted to the bus bar seat 16, the side plate It is elastically deformed to be on the same plane as (24). That is, in the process of mounting the bus bar 20 to the bus bar seat 16, the front end of the hanger piece 26 is guided to the side of the bus bar mount 16, and then elastically deformed, and then the hanger piece ( 26) When the tip is seated on the hook groove 17, the original state or elastic deformation is partially restored.

In the bus bar 20, there is a substrate connection piece 28 at one end of the coupling plate 22. The board connecting piece 28 is a part for electrically connecting the bus bar 20 and the board. Since the substrate connecting piece 28 needs to be electrically coupled to the substrate in the substrate seating portion 14, it is bent multiple times so as to cross the wall defining the substrate seating portion 14 and the bus bar seating portion 12. Is formed. In this embodiment, the substrate connecting piece 28 is made by vertically bending three times on the coupling plate 22.

Hereinafter, a series connection device for a battery module according to the present invention having the configuration as described above is assembled and used.

In the present design, the bus bars 20 are respectively seated on the bus bar seats 16 of the base 10. In the process in which the bus bar 20 is seated on the bus bar seat 16, the side plate 24 or the coupling plate 22 of the bus bar 20 have no elastic deformation at all. That is, when the spacing between the side plates 24 of the bus bar 20 is the same as or close to the width of the bus bar seating table 16, the coupling plate 22 of the bus bar 20 And the side plate 24 is in close contact with the bus bar seat (16). That is, in the assembly process, the elastic deformation does not occur in the coupling plate 22 or the side plate 24, and there is no possibility of plastic deformation.

However, the elastic deformation occurs in the process of the front end of the hook piece 26 is guided to both sides of the bus bar seat 16. The elastic deformation of the hook piece 26 starts from the base of the hook piece 26, that is, the part where the side plate 24 and the hook piece 26 are connected. This is because it is guided from the front end of the side plate 24 to the side of the bus bar seat 16. Therefore, the elastic deformation of the hook piece 26 is gradually increased to a small extent, and when the tip of the hook piece 26 is guided to the side of the bus bar seat 16, it is the largest.

Here, the distance from the side where the side of the bus bar seating table 16 starts to the hook groove 17 is very short. Therefore, the state in which the elastic deformation of the hook piece 26 is maximized becomes very short, and plastic deformation of the hook piece 26 hardly occurs. If plastic deformation occurs in the hanger piece 26, the tip of the hanger piece 26 is pushed to the inside of the hanger groove 17 using a tool, so that the tip of the hanger piece 26 is the hanger groove 17. ), you can hang it on (17').

As such, the hanger piece 26 of the bus bar 20 extends obliquely to the inside of the side plate 24, so that only the hanger piece 26 is elastically deformed in the bus bar 20, so that the bus bar 20 has a bus bar seat ( 16) the seating structure allows the coupling plate 22 and the side plate 24 of the bus bar 20 to be in close contact with the surface of the bus bar seat 20.

And, when the front end of the hook piece 26 is hooked to the hook 17 of the hook groove 17, the distance between the front end of the hook piece 26 and the bottom surface of the coupling plate 22 is the hook. The bus bar 20 does not flow with respect to the bus bar seat 16 due to a relationship that is equal to or shorter than the distance between the upper surfaces of the bus bar seat 16 on the back surface 17'.

On the other hand, in the state where the bus bar 20 is seated on the bus bar seat 16 as described above, the tab of the battery cell is passed through the gap between the bus bar seat 16 and the space 18. The front end is bent in close contact with the coupling plate 22 of the bus bar 20. And, it is coupled through welding to physically and electrically connect the tab of the battery cell and the bus bar 20. In this case, the tab of the battery cell and the substrate seated on the substrate seating portion 14 are electrically connected, and power and signals are transmitted to the outside through a mating connector coupled with a connector installed on the substrate.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be capable of various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

10: base 12: bus bar seating
14: Board seating part 16: Bus bar seating
17: Hanger Home 17': Hanging
18: Gap 19: Hook
20: bus bar 22: bonding plate
24: side plate 25: through
26: hook piece 28: board connection piece

Claims (8)

In the serial connection device for a battery module for connecting the tabs of a plurality of battery cells provided in the battery module in series,
A base made of an insulating material and having a plurality of bus bar seats having hook grooves formed on both sides,
It is elastically deformed while being guided to both sides of the bus bar seating table, and then restored while being restrained in the hanger groove. The tabs of the battery cells are connected in series, and the substrate in the substrate seating part provided in the base It includes an electrically connected bus bar,
The bus bar includes a coupling plate coupled to the tab of the battery cell and a side plate provided at both ends of the coupling plate, and the hook piece is formed in a cantilevered hole in the through hole formed in the side plate to extend obliquely toward the opposite side plate,
The distance between the front end of the hook piece and the bottom surface of the coupling plate is the same as or shorter than the distance between the top surface of the bus bar seating table and the inner surface of the hook groove.
The serial connection device for a battery module of claim 1, wherein a substrate seating part is formed on the base so as to share an edge with the busbar seating part having the busbar seating part and the busbar seating part.
The serial connection device for a battery module according to claim 2, wherein a spacer is provided between the bus bar seats and a tab of the battery cell passes through a gap between the spacer and the bus bar seats.
delete delete In the serial connection device for a battery module for connecting the tabs of a plurality of battery cells provided in the battery module in series,
A base made of an insulating material, having a plurality of bus bar seats and having at least two hook grooves formed on the side surfaces of the bus bar seats,
It includes a coupling plate seated on the upper surface of the bus bar seating and side plates seated on both sides of the bus bar seating, and the side plates are provided with a hanger piece at which a tip end hangs in the hanger groove. The distance between the ends of the hook side is extended to be formed shorter than the distance between both sides of the bus bar seating table to connect the tabs of the battery cells in series, and includes a bus bar that is electrically connected to the substrate on the substrate mounting portion provided in the base. and,
The distance between the front end of the hook piece and the bottom surface of the coupling plate is the same as or shorter than the distance between the top surface of the bus bar seating table and the inner surface of the hook groove.
delete The method of claim 6, wherein the base is a bus bar seating portion formed with the bus bar seating portion and a substrate seating portion formed to share an edge with the busbar seating portion, and the busbar seating portion has a space between the busbar seating portion. Further formed serial connection device for the battery module.

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